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Cornerstone · Grades 3–5 Keystones #1 16 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 3⁄5

    Answer: 26⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 29

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics Mean

    Find the mean of: 5, 4, 1, 17, 3

    Answer: 6

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